TUSB2036 not recognized

HUANG LANG QUAN

Prodigy 30 points

Other Parts Discussed in Thread: TUSB2036

Hello....my Englisg is not good....

My TUSB2036 Device have problem .

I connect it to computer,then after a few seconds it enter suspend mode.

this is my design:

DP0 DM0 (connected to 30 ohm resistor to upstream USB port,and respectively connected 22pf Capacitance to GND.)

NPINT = 00 (no permanently attached devices)

NP3 = 0

EXTMEM = 1 ( No ROM)

DP0PUR (1.5K resistor to DP0)

Xtal1 (connected to 6Mhz resonator)

Xtal2 (connected to 2.2K resistor then connected to 6Mhz crystal)

Mode = 0 (6Mhz)

BUSPWR = 0

OVRCUR 1-3 respectively connected to 15K resistor then connected to 3.3V (doesn't need overcurrent protection)

Reset (connected to 15k and 10uF to create reset signal.)

EEDATA/GANGED = 0

OCPROT/PWRSW = 0

All Downstream Ports +5V are Connected together.

over 11 years ago

0 Elias Villegas M. over 11 years ago

TI__Guru* 76130 points

Hello,

Your configuration seems to be correct, nevertheless, can you send your schematic for review.

Are you getting a error window?

Regards.

0 HUANG LANG QUAN over 11 years ago in reply to Elias Villegas M.

Prodigy 30 points

I think maybe my pcb layout have some mistake,I will check again after later

but I have a question

what the DP0 ~ 3 DM 0~3 pin capacitance effect?

If remove it, what any affect?

and how choose capacitance to create Reset single(when R = 15k )

computer windows is display "usb unknown device"

0 HUANG LANG QUAN over 11 years ago in reply to HUANG LANG QUAN

Prodigy 30 points

Oh ,I find the problem

the welding spot is bad contact , so I rewelding then problem is settle

0 Dmitri Abramovich over 8 years ago in reply to HUANG LANG QUAN

Prodigy 60 points

Hello.
I have same configuration as above, but the hub TUSB2036 can't recognize device, that connected to first port. The hub power form Vbus line through DC-DC conveter.

0 Joel Jimenez0 over 8 years ago in reply to Dmitri Abramovich

TI__Mastermind 18655 points

Hello Dmitri Abramovich,

The OVRCUR/ inputs require pull-up resistors.

0 Dmitri Abramovich over 8 years ago in reply to Joel Jimenez0

Prodigy 60 points

The OVERCUR3 have internal pull-up, also when connected to external pull-up I got same situation

0 Joel Jimenez0 over 8 years ago in reply to Dmitri Abramovich

TI__Mastermind 18655 points

Downstream facing ports must be connected from D+ and D- to ground. See the figure below the Rpd resistors 15 kΩ .

Interface

Interface forum

TUSB2036 not recognized